<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        html{
            font-size: 30px;
        }
        body{
            font-size: 30px;
        }
        .box1{
            height: 10em;
            width: 10em;
            background: orange;
        }
        .box2{
            height: 10rem;
            width: 10rem;
            background: hotpink;
        }
    </style>
</head>
<body>
    <div class="box1"></div>
    <div class="box2"></div>
</body>
</html>
